Ted Kaczynski Ted Kaczynski

Ted Kaczynski is flanked by federal agents as he is led from the federal courthouse in Helena, Mont., on April 4, 1996. Kaczynski is now serving a life sentence in prison for the bombings. John Youngbear/Associated Press hide caption

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John Youngbear/Associated Press

FBI Profiler Says Linguistic Work Was Pivotal In Capture Of Unabomber

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Oklahoma City Bombing: The Albert P. Murrah Federal Building shows the devastation caused by a fuel and fertilizer truck bomb on April 19, 1995. The blast killed 168 people and injured more than 500. Bob Daemmrich/AFP/Getty Images hide caption

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Bob Daemmrich/AFP/Getty Images